In america, NICKED means to get a very small cut of the skin. In slang, it means to have to pay (for) something, (usually a small amount) that was somewhat unexpected and unappreciated.

Australians use this expression to mean "get lost" or "go away!"

Get nicked : exclamation of contempt; (used imperatively) piss off !

get nicked = get caught by a policeman and sent to jail in the nick = in prison He robbed his neighbour and got nicked.

can also mean to generally go away if someone says "Nick off" or "get nicked" in some slang forms of English.